Tuning vintage nitro motors?

[FerrisBFW]

Here hoping this gets noticed by someone out there who knows their vintage nitro motor tuning.

 

I have a couple old cars from the 80's, a SG and a Landjump running a Picco P1 RE and a OS21FSR-C ABC.  Both engines are almost mint.

Can someone help me with the original settings and some basic tuning tips?  I used to be pretty good at this back in the day, but it was 35 years ago....

Mark

[oz-trash-cowboy]

Setting up nitro motors is an art. Of this era, os were normally easier to work with. For the OS21FSR-C ABC. I used OS number 8 glow plug ( medium ), 7 - 10% nitro, ( avoid old fuel ). Dont quote me, but if i remember correctly for the needle valve it was 3-4 full turns from closed, for a rich start, and then leaned out from there. 

Picco's P1's were more fussy / fuel sensitive.